At what temperature does oil breakdown begin to occur?

The breakdown of oil begins to occur at approximately 350°F. At this temperature, the thermal stability of the oil starts to deteriorate, leading to chemical changes that can result in the formation of harmful byproducts such as carbon and sludge. These byproducts can compromise the efficiency of compressors and other components within an HVAC system, increasing the risk of mechanical failure and the need for maintenance.

Understanding the temperature thresholds for oil breakdown is critical in refrigeration and air conditioning applications. It helps technicians select appropriate oils for their systems and establish safe operating conditions to maintain optimal performance. Operating consistently above this temperature can significantly reduce the lifespan of the lubricants used, thereby impacting the overall reliability and efficiency of the equipment.